Merge stable-1.5 into stable-1.6

[1.5] obj: fix possible memory leak in tx_add_lock

Ref: pmem/issues#1028

Bug fixes from stable-1.6

test: preserve UNITTEST_CHECK_OPEN_FILES_IGNORE_BADBLOCKS in test

After pmem/pmdk#3099 pmemdetect on windows was silently failing due to
missing access to libpmem which was moved to a different directory.
To fix this issue we have to append lib directory to the PATH variable.

This change moves pmemdetect related code to a separate
thread (separate shell), as we should not modify PATH
variable in the user shell.

preserving the environment variable TEST will set it to empty value
in variable is not set. We need to handle this case in the unittest
framework

ref: pmem/issues#1101

test: fix match file in rpmem_addr_ext test

Information about libfabric fork safety is no longer printed

test: fix match files in tests which use dax devices

Merge stable-1.5 into stable-1.6

test: suppress ld leak

common: fix persistent domain termination

Ref: pmem/issues#1098

Ref: pmem/issues#1093
Ref: pmem/issues#1096
Ref: pmem/issues#1097

test: remove invalid expect_normal_exit

expect_normal_exit is incompatible with copy_file_to_node and is
causing trouble when used with valgrind.

Ref: pmem/issues#1092

test: overwrite old log in pmempool_create/TEST14.PS1 

Ref: pmem/issues#1013

test: remove old log files for windows

Ref: pmem/issues#1013

test: adjust matchfiles in vmem_valgrind_region test

test: require enoug space for obj_zones/TEST1

Merge stable-1.5 into stable-1.6

obj: fix recycler not locating unused chunks

In scenarios where free() is done very rarely the memory in the recycler
would not be looked at because the estimates would indicate that no memory
was freed and there's no reason to search the tree. Normally that's OK,
because eventually the heap would trigger a forced search of the entire
recycler for the allocation class, locating all the memory that might have
been missed. But, the forced recalculation erronously looked at the
estimates and required that at least some memory were freed since the
last recycler run - which might have not been the case.
This patch makes the forced recycling run without looking at the estimates.

Reported-by: Denny Zhao <denny.zhao@memverge.com>

examples: fix two strncpy issues

test: delete vmem delete

Ref: pmem/issues#1074

We decided to remove this tests,
because it checks undefined behavior;
operations on deleted pool.

Merge stable-1.5 to stable-1.6